stencil.hpp

/*
    Stencil buffer management.
    Copyright (C) 2015 Denis BOURGE

    This library is free software; you can redistribute it and/or
    modify it under the terms of the GNU Lesser General Public
    License as published by the Free Software Foundation; either
    version 2.1 of the License, or (at your option) any later version.

    This library is distributed in the hope that it will be useful,
    but WITHOUT ANY WARRANTY; without even the implied warranty of
    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
    Lesser General Public License for more details.

    You should have received a copy of the GNU Lesser General Public
    License along with this library; if not, write to the Free Software
    Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301
    USA
*/

#ifndef HX3D_GRAPHICS_STENCIL
#define HX3D_GRAPHICS_STENCIL

#include "hx3d/graphics/gl.hpp"

namespace hx3d {
namespace graphics {

class Stencil {
public:
  enum class Function {
    Never = 0,
    Always,
    Equal,
    NotEqual,
    Less,
    Greater,
    LessOrEqual,
    GreaterOrEqual
  };

  enum class Operation {
    Keep = 0,
    Zero,
    Replace,
    Increment,
    IncrementWrap,
    Decrement,
    DecrementWrap,
    Invert
  };

  static void enable();

  static void disable();

  void setFunction(Function func, int ref, int mask);

  void setOperation(Operation sfail, Operation dpfail, Operation dppass);

  void begin();

  void end();

private:
  GLenum convertFunction(Function func);
  GLenum convertOperation(Operation op);
};

} /* graphics */
} /* hx3d */

#endif